<!DOCTYPE html>
<meta charset="utf-8">
<link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">
<link rel="help" href="https://drafts.csswg.org/css-grid-1/#alignment">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1881671">
<link rel="match" href="firefox-bug-1881495-ref.html">
<meta name="assert" content="An auto-block-size grid should choose a content-based block-size that accounts for linewrapping in its content-sized items">
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css">
<style>
:root {
  font: 30px/1 Ahem;
}
.grid {
  display: inline-grid;
  border: 4px solid gray;
  justify-items: start;
  vertical-align: top;
}
.negMargin {
  margin-inline-end: -1px;
}
</style>
<div class="grid" style="inline-size: 1em">
  <div>
    X
    <span class="negMargin">X</span>
  </div>
</div>
<div class="grid" style="inline-size: 2em">
  <div>
    X
    <span class="negMargin">X</span>
  </div>
</div>
<div class="grid" style="inline-size: 3em">
  <div>
    X
    <span class="negMargin">X</span>
  </div>
</div>
<br>
<br>
<div class="grid" style="writing-mode: vertical-rl; inline-size: 1em">
  <div>
    X
    <span class="negMargin">X</span>
  </div>
</div>
<div class="grid" style="writing-mode: vertical-rl; inline-size: 2em">
  <div>
    X
    <span class="negMargin">X</span>
  </div>
</div>
<div class="grid" style="writing-mode: vertical-rl; inline-size: 3em">
  <div>
    X
    <span class="negMargin">X</span>
  </div>
</div>
